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The One DepreciationSetting Quietly CostingReal Estate InvestorsTens of Thousands a Year
It's completely legal. The IRS publishes its own guidance on it. Anda 2025 tax-law change just made it more valuable than it's been inyears — here's what it is, and how to find out what it could be worthon your property.
5 min read
Nischay Rawal, CPA, EA
Managing Partner, NR CPAs & Business Advisors
6 min read
wo investors buy the same building. Same purchase price — a million dollars.Same kind of property, same year, same market. On paper, identical.
wo investors buy the same building. Same purchase price — a million dollars.Same kind of property, same year, same market. On paper, identical.
But when tax season comes, one of them keeps tens of thousands of dollars morethan the other.
Not because of a risky loophole. Not because one got a better deal or a smarteragent. The only difference is a single decision each of their accountants made —or, more often, never thought to bring up.
It comes down to one quiet setting in how a property is depreciated. And if you ownrental real estate, there's a real chance that setting is costing you money right now.Here's how it works, and how to find out whether it's happening to you.
The “default setting” almost nobody questions
When you buy an investment property, the IRS lets you deduct the cost of thebuilding over time. That's depreciation — one of the biggest tax advantages realestate has. The catch is how most accountants apply it.
By default, they depreciate the entire building on a straight line over a single longschedule. Under IRS rules, that's 27.5 years for residential rental property and 39years for commercial property (Publication 946; Publication 527). The wholestructure, treated as one block, deducted in equal slivers, decade after decade.
So a $1,000,000 building might hand you somewhere around $25,000 ofdepreciation in a given year. (Illustrative — your number depends on the property.)A steady trickle — while you pay the IRS full freight today. Here's the part thatsurprises people: those deductions aren't missing. They're just stuck in slowmotion. There's a legal, IRS-recognized way to change that timing. Most investorshave just never had anyone walk them through it.
What cost segregation actually is (in plain English)
For tax purposes, a building isn't really one single thing. It's made of components— flooring, cabinetry, light fixtures, certain specialized electrical and plumbing,landscaping, fencing, paving. And under the tax code, many of those don't have toride the building's long schedule. They legally qualify for much shorter ones: 5, 7,or 15 years. A cost segregation study is an engineering-based analysis thatidentifies which parts qualify, and reclassifies them.
Recovery periods per IRS Publication 946 & 527. Exact classification is determined by the engineering study;examples are illustrative. The building shell stays on its long schedule — only qualifying components move.
39 years → 5 / 7 / 15 years
Why this matters more in 2025
For years, “bonus depreciation” — the rule that lets you deduct the full cost ofshort-life property in year one — was phasing out, down to 40% for 2025 andheaded to zero. Then the One Big Beautiful Bill Act (signed July 4, 2025)permanently restored 100% bonus depreciation for qualifying property acquiredand placed in service after January 19, 2025. The IRS confirmed it in Notice 2026-11.
The short-life components a study reclassifies — the 5-, 7-, and 15-year propertyabove — are exactly the kind that qualify for that 100% bonus. (The building shelldoes not.) So the slice a study moves onto short schedules can now be deducted infull, in year one.
What could this be worth on your property?
Enter your property details for an illustrative first-year range.
“Wait — is this actually legal?”
Yes. Cost segregation isn't a loophole — it's a recognized method of depreciation,and the IRS publishes its own Cost Segregation Audit Techniques Guide(Publication 5653) telling examiners how to review these studies. Agencies don'twrite detailed audit manuals for things that aren't an established part of the code.What makes a study sound is how it's done: engineering-based and documented,so the position stands on its own.
“Wouldn’t my accountant have done this?”
Often not — and it's usually not a knock on them. Most firms are built forcompliance: filing accurately and on time. Proactive strategy like an engineeringbased study is a different discipline, and many excellent CPAs don't run them inhouse. If it's never come up, it usually just means that question was never asked.
Trusted by clients across multiple industries. Licensed CPAs and Enrolled Agents, Miamibased, serving clients nationwide.
Is it worth it for your property?
Not always — and anyone who says otherwise is selling. It depends on theproperty's size and type, the timing, and the one question most people skip: canyou actually use a large deduction this year? That hinges on your participationstatus and income picture. The only way to know your real number is to run youractual property.
Here's our actual promise: if we run your numbers and a study isn't clearly worthmore than it costs, we'll tell you that on the call. No pressure. We'd rather earn yourtrust than push a study you don't need.
Get your free Cost Segregation Savings Estimate
A few questions, a short call, and a real dollar figure for what a studycould be worth on your property — before you commit to anything.
or call +1 954-231-6613
IRS — Treasury, IRS issue guidance on the additional first year depreciation deduction (Notice 2026-11)— irs.gov
IRS — Cost Segregation Audit Techniques Guide (Publication 5653) — irs.gov/pub/irs-pdf/p5653.pdf
IRS — Publication 946, How To Depreciate Property — irs.gov/publications/p946
IRS — Publication 527, Residential Rental Property — irs.gov/publications/p527
Figures on this page are illustrative and for educational purposes only and are not a prediction of resultsfor any specific property. Cost segregation accelerates the timing of depreciation deductions; it does notcreate a permanent tax reduction and is not a tax “credit.” Bonus-depreciation eligibility depends onacquisition and placed-in-service timing and other factors; results vary by property and individualcircumstances. This page does not constitute tax, legal, or accounting advice. Consult a qualifiedprofessional regarding your situation.
